Crystal structure and high temperature Raman spectroscopy of Sr2ZnTeO6 double perovskite

Manoun, BouchaibUniv Hassan 1Er, Lab Sci Mat Milieux & Modelisat LS3M, Khouribga 25000, Morocco.;Univ Mohamed VI Polytech, Mat Sci & Nanoengn Dept, Lot 660 Hay Moulay Rachid, Benguerir 43150, Morocco. (författare)

Sr2ZnTeO6 double-perovskite oxide has been synthesized using solid state chemistry. As synthesized, the crystalline structure of Sr2ZnTeO6, refined using x-ray diffraction, is monoclinic having the space group I2/m. Structural phase transitions are studied using Raman spectroscopy in the temperature range 25 degrees C-567 degrees C. It is found that two of three observed bending Raman vibrations merge together at a temperature of around 120 degrees C, indicating a Sr2ZnTeO6 phase transition from the monoclinic (I2/m) to the tetragonal (I4/m). Furthermore, a temperature-dependence change-rate of external and O-Te-O bending modes and stretching modes are detected at 270 degrees C, which is interpreted as a phase transition from the tetragonal (I4/m) to the cubic (Fm-3m) structure.

Tamraoui, Y.Univ Hassan 1Er, Lab Sci Mat Milieux & Modelisat LS3M, Khouribga 25000, Morocco.;Univ Mohamed VI Polytech, Mat Sci & Nanoengn Dept, Lot 660 Hay Moulay Rachid, Benguerir 43150, Morocco. (författare)
Saadoune, I.Univ Mohamed VI Polytech, Mat Sci & Nanoengn Dept, Lot 660 Hay Moulay Rachid, Benguerir 43150, Morocco.;Univ Cadi Ayyad, FST Marrakech, LCME, Av A Khattabi, Marrakech 40000, Morocco. (författare)
Lazor, PeterUppsala universitet,Mineralogi, petrologi och tektonik(Swepub:uu)petelazo (författare)
Yang, W.Ctr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China. (författare)
Alami, J.Univ Mohamed VI Polytech, Mat Sci & Nanoengn Dept, Lot 660 Hay Moulay Rachid, Benguerir 43150, Morocco. (författare)
Univ Hassan 1Er, Lab Sci Mat Milieux & Modelisat LS3M, Khouribga 25000, Morocco.;Univ Mohamed VI Polytech, Mat Sci & Nanoengn Dept, Lot 660 Hay Moulay Rachid, Benguerir 43150, Morocco.Univ Mohamed VI Polytech, Mat Sci & Nanoengn Dept, Lot 660 Hay Moulay Rachid, Benguerir 43150, Morocco.;Univ Cadi Ayyad, FST Marrakech, LCME, Av A Khattabi, Marrakech 40000, Morocco. (creator_code:org_t)

Av författaren/redakt...: Manoun, Bouchaib; Tamraoui, Y.; Saadoune, I.; Lazor, Peter; Yang, W.; Alami, J.

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